Could you share your messageTally. If you are using floatarray logic
then most of the math is done in the plugin. However
the plugin does not take advantage of any vector processing hardware
you might have so there is room for improvement.
Also if you have say a+b*c-d in smalltalk where these are float
array objevcts that would three primitive interactions, converting
that to slang would provide some performance improvements.
On Dec 13, 2006, at 6:58 AM, David Faught wrote:
> This may sound like a Croquet question at first, but it's really a
> Squeak question. At least that's my impression :-)
>
> I have been toying with the idea of redoing a physics simulation that
> Orion Elenzil originally did in order to make a more general physics
> engine for Croquet, with the idea that it would be coded it in Slang
> so that it could eventually be compiled as a plugin for speed.
>
> As a preliminary step, I profiled Orion's simulation using
> MessageTally to get a general idea of where to concentrate my efforts.
> The results showed that almost 80% of the time was spent in basic
> floating point array operations like addition and subtraction. Which,
> as far as I can tell, is already being done in a plugin!
>
> Does this mean that this project is a waste of time, as far as
> performance gain is concerned? Or is there something still to be
> gained, like maybe minimizing conversion between internal and external
> representations?
>
> Is there some way to tell if the actual floating point operations are
> being done in hardware? I would guess that they must be, but how can
> I tell for sure?
>
> Thanks for any guidance.
>
--
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John M. McIntosh <
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Corporate Smalltalk Consulting Ltd.
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